NPKI · Insider Trading
NPK International Inc.
Every open-market purchase and sale reported by NPKI officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-24 | III Alvin James Barton | EVP Commercial Growth & Ops. | A | +12,850 | — |
| 2026-09-10 | Matthew James Warren | Chief Accounting Officer | Sell | −2,991 | −$40.11K |
| 2026-08-31 | Rose M Robeson | Director | Sell | −10,000 | −$134.92K |
| 2026-08-19 | Michael A Lewis | Director | Sell | −2,013 | −$28.71K |
| 2026-07-29 | Kristen J. Pederson | Director | A | +6,614 | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| Rose M Robeson | Director | 215,147 | $2.37M |
| Michael A Lewis | Director | 135,865 | $1.50M |
| Matthew James Warren | Chief Accounting Officer | 51,439 | $566.34K |
| III Alvin James Barton | EVP Commercial Growth & Ops. | 12,850 | $141.48K |
| Kristen J. Pederson | Director | 6,614 | $72.82K |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the NPKI quote page; the site-wide leaderboard is on the insider transactions hub.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.